7. Presence of severe renal disease. BUN 50% greater than normal (normal BUN levels should be within a range of 5 to 20 mg/ d L and creatinine between .7 and 1.4 mg/ d L). Labs within the past 12 months will be requested from the patient's health care provider or urologist. If labs are not available within this time-frame or if results are abnormal, labs will be obtained as part of the screening visit.